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Here's Looking At You, Kid, MGS Sees Mars Odyssey and Mars Express
lyford
post May 19 2005, 07:39 PM
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Sweet!

http://www.msss.com/mars_images/moc/2005/05/19/index.html



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"Zis is not nuts, zis is super-nuts!" Mathematician Richard Courant on viewing an Orion test
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djellison
post May 23 2005, 11:29 AM
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Not to mention it's also quite usefull practice for orbital rendezvous w.r.t. MSR in the not TOO distant future. MRO has a nav camera - and MTO will do some on orbit rendezvous experiments.

Doug
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garybeau
post May 24 2005, 10:16 PM
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I did manage to find a couple of tidbits about the Viking orbits. It looks like they were left in pretty eccentric orbits.

"On 7 August 1980 Viking 1 Orbiter was running low on attitude control gas and its orbit was raised from 357 x 33943 km to 320 x 56000 km to prevent impact with Mars and possible contamination until the year 2019. "


The orbiter(Viking 2)developed a leak in its propulsion system that vented its attitude control gas. It was placed in a 302 x 33176 km orbit and turned off on 25 July 1978 after returning almost 16,000 images in 706 orbits around Mars.

http://space.skyrocket.de/doc_sdat/viking-1.htm

It looks like we got about another 14 years to get a picture of V1.

Judging by it's orbit, I would say it would be a good time to put a seismometer on the ground and listen for V2's arrival. tongue.gif

Would these orbits have circularized quit a bit by now? With such a low periapsis, it would almost be like a mild aerobraking.


Gary
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ElkGroveDan
post May 25 2005, 03:20 AM
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QUOTE (garybeau @ May 24 2005, 10:16 PM)
I did manage to find a couple of tidbits about the Viking orbits. It looks like they were left in pretty eccentric orbits.

"On 7 August 1980 Viking 1 Orbiter was running low on attitude control gas and its orbit was raised from 357 x 33943 km to 320 x 56000 km to prevent impact with Mars and possible contamination until the year 2019. "


The orbiter(Viking 2)developed a leak in its propulsion system that vented its attitude control gas. It was placed in a 302 x 33176 km orbit and turned off on 25 July 1978 after returning almost 16,000 images in 706 orbits around Mars.

http://space.skyrocket.de/doc_sdat/viking-1.htm

It looks like we got about another 14 years to get a picture of V1.

Judging by it's orbit, I would say it would be a good time to put a seismometer on the ground and listen for V2's arrival. tongue.gif

Would these orbits have circularized quit a bit by now? With such a low periapsis, it would almost be like a mild aerobraking.


Gary
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That was great reading. Thanks for finding those. I was in high school back then and became a Viking news junkie. We are so spoiled these days with the Internet compared to how much information was available back then.


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Posts in this topic
- lyford   Here's Looking At You, Kid   May 19 2005, 07:39 PM
- - djellison   And to think - I'm giving a talk that includes...   May 19 2005, 07:41 PM
- - um3k   That's awesome!   May 19 2005, 08:43 PM
- - Bob Shaw   I wonder whether MGS could image the derelicts orb...   May 19 2005, 09:18 PM
|- - jamescanvin   Wow I never thorght I'd see anything like t...   May 20 2005, 03:13 AM
|- - garybeau   QUOTE (Bob Shaw @ May 19 2005, 04:18 PM)I won...   May 22 2005, 01:04 AM
|- - Bob Shaw   It certainly wouldn't be *easy*, but the MGS g...   May 22 2005, 11:17 AM
|- - garybeau   Here's a bit of info on the difficulty MGS had...   May 22 2005, 04:13 PM
|- - Bob Shaw   The way that planetary atmospheres behave can be c...   May 22 2005, 07:45 PM
|- - garybeau   Thanks for all the info, I guess with a 140 deg. F...   May 22 2005, 10:31 PM
|- - Bob Shaw   As MGS nears the end of it's lifetime there ap...   May 23 2005, 10:38 AM
- - paxdan   stunning. they imaged mars express too   May 20 2005, 11:50 AM
|- - Bob Shaw   Of course, the *first* spacecraft to image another...   May 20 2005, 10:41 PM
|- - akuo   QUOTE (Bob Shaw @ May 20 2005, 10:41 PM)Of co...   May 20 2005, 10:56 PM
||- - Bob Shaw   Nope - Beagle 2 was certainly in orbit of Mars...   May 20 2005, 11:05 PM
||- - djellison   QUOTE (Bob Shaw @ May 20 2005, 11:05 PM)Nope ...   May 20 2005, 11:18 PM
||- - Bob Shaw   Doug: I thought Mars Express was in an initial or...   May 20 2005, 11:36 PM
|- - ElkGroveDan   QUOTE (Bob Shaw @ May 20 2005, 10:41 PM)Of co...   May 20 2005, 10:59 PM
|- - Bob Shaw   No, you're still in orbit, it's just that ...   May 20 2005, 11:03 PM
- - akuo   Come to think of this, the Viking craft did enter ...   May 20 2005, 11:27 PM
- - djellison   Viking 1 & 2, and Russias Mars 2, 3 and 5 all ...   May 20 2005, 11:30 PM
- - djellison   QUOTE 19th Dec:08:31 GMT:Eject command sent to Mar...   May 21 2005, 12:11 AM
|- - Bob Shaw   Doug (et al): I was wrong about Mars Express ente...   May 21 2005, 01:15 PM
- - edstrick   The 1971 Soviet Mars missions included a cosmos ...   May 21 2005, 02:52 AM
|- - tedstryk   The Soviet Mars orbiters released their landers be...   May 21 2005, 03:43 AM
- - edstrick   The Soviet planetary series consisted of poorly do...   May 21 2005, 07:52 AM
- - Analyst   MGS has wide angle cameras as well. One medium (or...   May 22 2005, 05:19 PM
- - djellison   There are two WA cams on MOC - but they're alm...   May 22 2005, 05:43 PM
- - Analyst   I always thought the two cameras are different, be...   May 22 2005, 06:57 PM
- - djellison   Much-info... http://www.msss.com/mars/observer/ca...   May 22 2005, 07:44 PM
- - ilbasso   The other difficulty is getting the viewing geomet...   May 23 2005, 10:37 AM
- - djellison   Not to mention it's also quite usefull practic...   May 23 2005, 11:29 AM
- - garybeau   I did manage to find a couple of tidbits about the...   May 24 2005, 10:16 PM
- - ElkGroveDan   QUOTE (garybeau @ May 24 2005, 10:16 PM)I did...   May 25 2005, 03:20 AM


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